Tuberculosis (TB) – Transmission, Symptoms, and the Importance of Vaccination

 Tuberculosis (TB) is an infectious disease caused by the bacterium Mycobacterium tuberculosis. It primarily affects the lungs but can spread to other organs such as the brain, spine, and kidneys. TB is a major global health concern, particularly in developing countries where crowded living conditions and limited access to healthcare increase its spread. The disease can be classified into latent TB, where the bacteria remain inactive without symptoms, and active TB, where the infection progresses and becomes contagious. Without proper treatment, TB can be life-threatening and lead to severe complications.

The transmission of TB occurs through airborne droplets when an infected person coughs, sneezes, or speaks. People who spend prolonged periods in close contact with TB patients, such as family members or healthcare workers, are at higher risk. However, TB does not spread through casual contact like shaking hands or sharing food. Certain factors, such as weakened immune systems, malnutrition, and chronic diseases like HIV/AIDS, increase susceptibility to TB infection. Early detection and proper treatment are essential to prevent the disease from spreading within communities.

Common symptoms of active TB include persistent cough lasting more than three weeks, coughing up blood, chest pain, fever, night sweats, and unexplained weight loss. Fatigue and loss of appetite are also common signs. In cases of extrapulmonary TB, symptoms vary depending on the affected organ. For instance, TB in the spine can cause severe back pain, while TB in the kidneys may lead to blood in the urine. Many individuals with latent TB do not show symptoms, making routine screenings vital for at-risk populations. Without timely intervention, TB can progress and cause irreversible lung damage.

Vaccination plays a crucial role in TB prevention. The Bacille Calmette-Guérin (BCG) vaccine is widely used in countries with high read more